Ball Valves for District Heating
Ball Valves for District Heating
(OP)
I am researching trunnion ball valves for undeground district heating applications: 20-32", full bore, weld ends, water at 320F and 240 psi. What manufacturers/types provide the best cost/benefit ratio for that application considering that it is a relatively low pressure, not highly corrosive environment, water not gas, etc.





RE: Ball Valves for District Heating
RE: Ball Valves for District Heating
However, if you still wish to pursue the ball valve, I would suggest the following spec assuming that the water is treated and is non-corrosive: Split-body, trunnion mounted, carbon steel body with carbon steel nickel/chrome plated trim, soft seated. This is the most economical combination. If your medium requires a more corrosion resistant trim, then specify SS 316. In any case, you will need to verify that the soft seat and seal materials can meet your P-T ratings.
RE: Ball Valves for District Heating
RE: Ball Valves for District Heating
As far as who has the best valves goes, I'd check into who has the best local representation. Even the best manufacturers have the "company idiot" somewhere in their organization. If he happens to be the rep for your area, and you get stuck with him, you'll have no end of problems, no matter how good the product is.
RE: Ball Valves for District Heating
http://www.pbv-usa.com/
Mike
Mike